Comrades carry an injured Ukrainian serviceman on board a Ukrainian military plane to be transported to Ukraine at Rostov-on-Don's airport, in Russia, early Thursday, July 24, 2014. Several Ukrainian servicemen had to cross the border into Russia after they were injured in clashes with pro-Russia rebels in eastern Ukraine.(AP Photo/Sergei Pivovarov)

Australia's Prime Minister Tony Abbott speaks during a news conference in Sydney, Australia, in this July 19, 2014 file photo. Abbott said on Wednesday July 23, 2014 he was discussing with government leaders options for securing the 50-square kilometer (20-square mile) crash site, including his preferred option of a multinational security force mounted by countries such as Australia, Netherlands and Malaysia that lost citizens in the disaster. (AP Photo/Rob Griffith, File)

In this framegrab made from a video provided by press service of the rebel Donetsk People's Republic and icorpus.ru, pro-Russians collect parts of the burning debris of a Ukrainian military fighter jet, shot down at Savur Mogila, eastern Ukraine, Wednesday, July 23, 2014. Two Ukrainian military Sukhoi-25 fighters have been shot down in the east, according to the country's Defense Ministry. (AP Photo/icorpus.ru, Press Service of the rebel Donetsk People's Republic)

Soldiers load coffins into cars under a Ukrainian flag during a ceremony to mark the return of the first bodies, of passengers and crew killed in the downing of Malaysia Airlines Flight 17, from Ukraine at Eindhoven military air base, Wednesday, July 23, 2014. After being removed from the planes, the bodies are to be taken in a convoy of hearses to a military barracks in the central city of Hilversum, where forensic experts will begin the painstaking task of identifying the bodies and returning them to their loved ones. (AP Photo/Martin Meissner)

KHARKIV, Ukraine (AP) — Two more military aircraft carrying remains of victims from the Malaysian plane disaster arrived in the Netherlands on Thursday, while Australian and Dutch diplomats joined to promote a plan for a U.N. team to secure the crash site which has been controlled by pro-Russian rebels.

All 298 people aboard Malaysia Airlines Flight 17 — most of them Dutch citizens — were killed when the plane was shot down on July 17. U.S. officials say the Boeing 777 was probably shot down by a missile from territory held by pro-Russian rebels, likely by accident.

Australian Prime Minister Tony Abbott, who says he fears some remains will never be recovered unless security is tightened, has proposed a multinational force mounted by countries such as Australia, the Netherlands and Malaysia that lost citizens in the disaster.

To that end, Abbott said Thursday he had dispatched 50 police officers to London to be ready to join any organization which may result.

Australia's Foreign Minister Julie Bishop was traveling with her Dutch counterpart Frans Timmermans to Kiev to seek an agreement with the Ukraine government to allow international police to secure the wreckage, Abbott said.

Details including which countries would contribute and whether officers would be armed and protected by international troops were yet to be agreed, Abbott said.

On Monday, the U.N. Security Council unanimously approved a resolution proposed by Australia demanding that rebels cooperate with an independent investigation and allow all remaining bodies to be recovered.

The first bodies remains arrived in the Netherlands on Wednesday and were met by Dutch King Willem-Alexander, Queen Maxima and hundreds of relatives. The two planes Thursday brought a total of 74 more coffins back to the Netherlands, said government spokesman Lodewijk Hekking.

The Dutch investigators gave permission for what it called "local parties" to move wreckage at the site in order to recover remaining victims. Conditions at the site, spread across farm fields in open countryside, have made recovery and investigation a slow and sometimes chaotic process, with rebel gunmen controlling the area and at time hindering access.

Patricia Zorko, head of the National Police Unit that includes the Dutch national forensic team, said some 200 experts, including 80 from overseas, were working in Hilversum at a military barracks on the outskirts of the central city of Hilversum to identify the dead. Around the world some 1,000 people are involved in the process, which also includes gathering information from next of kin.

Staff will "examine the bodies, describe the bodies, take dental information, DNA and put all the information together in the computer and compare this information with the information they gathered from the families in the last days," police spokesman Ed Kraszewski said in a telephone interview. "Then we have to see if there is a match."

There are three scientific methods of identifying bodies — dental records, finger prints and DNA.

After the experts believe they have positively identified a body, they defend their findings to an international panel. If both agree, the positive identification will be sent to a Dutch prosecution office, which has the power to release the body to the next of kin.

Zorko warned that the process of identification could be drawn out.

"Unfortunately this type of investigation often takes time," she said. "Count on weeks and maybe even months."

The Dutch Safety Board said investigators in England successfully downloaded data from Flight 17's Flight Data Recorder. It said "no evidence or indications of manipulation of the recorder was found." It did not release any details of the data.

Meanwhile, police and traffic authorities appealed to the public not to stop on the highway as a convoy of hearses passes by Thursday on its way from Eindhoven Air Base to Hilversum.

On Wednesday, the convoy of hearses passed through roads lined with thousands of members of the public, who applauded, threw flowers or stood in silence as the cars drove by.

The Dutch Foreign Ministry said Thursday that the number of Dutch victims had risen by one to 194, taking into account a woman with joint German and Dutch nationalities who earlier had been listed as German.

Senior U.S. intelligence officials said Tuesday that Russia was responsible for "creating the conditions" that led to the crash, but offered no evidence of direct Russian government involvement.

The officials said the plane was likely shot down by an SA-11 surface-to-air missile fired by Russian-backed separatists in eastern Ukraine. The U.S. officials cited intercepts, satellite photos and social media postings by separatists, some of which have been authenticated by U.S. experts.

Russia on Thursday brushed off the accusations. Deputy Defense Minister Anatoly Antonov said in a video statement that if the U.S. officials indeed had the proof the plane shot down by a missile launched from the rebel-held territory, "how come they have not been made public?"

Pro-Russian rebels and Ukrainian government troops have been fighting for more than three months, leaving at least 400 dead and displacing tens of thousands.

Ukrainian forces are trying to ride the momentum of taking the strategic city Slovyansk on July 5 which was in rebel hands for more than two months. Government forces are now closing in on Donetsk, where insurgents regrouped after leaving Slovyansk, and are trying to cut off supply routes to rebels based in the neighboring Luhansk region.

__

Nataliya Vasilyeva in Moscow, Lucian Kim in Donetsk, Mike Corder in The Hague, Netherlands, and Rod McGurk in Canberra, Australia, contributed to this report.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

*We welcome your comments on the stories and issues of the day and seek to provide a forum for the community to voice opinions. All comments are subject to moderator approval before being made visible on the website but are not edited. The use of profanity, obscene and vulgar language, hate speech, and racial slurs is strictly prohibited. Advertisements, promotions, and spam will also be rejected. Please read our terms of service for full guides